Word used to call someone pretty.
Often used by awkward thirty-somethings with no social skills and a small penis.
Man: "You look spiffarific tonight Sally."
Sally: "Even the money isn't worth this shizz. I gotta go."
A step higher from spiffy, and even from the stylized "spiffay".
Man #1: That roller coaster was freakin' awesome.
Man #2: No, I think you mean spiffarific. It was freakin' spiffarific.